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Ultrasonic velocimetry based on the Doppler shift effect accurately provides quasi-instantaneous flow fields for fluids with a sufficiently high acoustic scattering level. However, ultrasonic velocity instruments are known to perform poorly in clear water with low acoustic scattering level, which are frequent conditions in laboratory applications. This work confirms a technique to solve the problem...
The in-line assessment of the rheological properties of fluids is fundamental for the production process optimization and for ensuring a high product quality in chemical, cosmetic, pharmaceutical, and food industries. The rheology of a fluid flowing in a pipe can be investigated through the combination of Pressure Difference (PD) and Pulsed Ultrasound Velocimetry (PUV) methods. In particular PUV is...
For chemical, cosmetic, pharmaceutical, and food industries the rheological properties of a product represent an important quality factor. Unfortunately such features are often difficult to estimate, in particular in a continuous production process. In this work, we present an ultrasound (US) Doppler method suitable for in-line rheological assessment of highly filled opaque suspensions. The velocity...
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